A Combined Prediction Model for Hog Futures Prices Based on WOA-LightGBM-CEEMDAN

Table 7

Fitting error analysis of the four models.

Date	Real	CEEMDAN		EEMD		SVR		WOA-LightGBM
		Fitted value	Error	Fitted value	Error	Fitted value	Error	Fitted value	Error
2021/5/28	22485	22489.67	−4.67	22484.88	0.12	22530.28	−45.28	22485	0
2021/5/31	22245	22242.76	2.24	22237.85	7.15	22180.4	64.60	22140.26	104.74
2021/6/1	22025	22015.68	9.32	22008.5	16.50	22011.98	13.02	21948.65	76.35
2021/6/2	21525	21523.93	1.07	21518.05	6.95	21463.73	61.27	21412.14	112.86
2021/6/3	20640	20642.38	−2.38	20637.71	2.29	20630.58	9.42	20563.5	76.50
2021/6/4	19870	19883.66	−13.66	19878.53	−8.53	19960.14	−90.14	19908.5	−38.50
2021/6/7	20025	20024.6	0.40	20017.03	7.97	19974.63	50.37	19929.61	95.39
2021/6/8	19770	19767.81	2.19	19759.64	10.36	19752.83	17.17	19693.65	76.35
2021/6/9	20215	20211.61	3.39	20201.77	13.23	20148.2	66.80	20096.61	118.39
2021/6/10	19935	19932.91	2.09	19921.95	13.05	19932.15	2.86	19862.48	72.52
…	…	…	…	…	…	…	…	…	…
2021/7/8	18865	18862.46	2.54	18849.55	15.45	18858.18	6.82	18788.5	76.50
2021/7/9	19165	19164.54	0.46	19151.03	13.97	19131.55	33.45	19079.9	85.10
2021/7/12	18760	18758.54	1.46	18748.36	11.64	18717.02	42.98	18662.11	97.89
2021/7/13	18270	18284.68	−14.68	18272.09	−2.09	18364.79	−94.79	18304.53	−34.53
2021/7/14	18210	18225.68	−15.68	18216.4	−6.40	18292.82	−82.82	18248.5	−38.50
2021/7/15	18120	18137.65	−17.65	18128.5	−8.50	18199.54	−79.53	18154.53	−34.53
2021/7/16	18400	18415.71	−15.71	18408.92	−8.92	18407.64	−7.64	18363.31	36.69
2021/7/19	18785	18793.16	−8.16	18786.45	−1.45	18743.8	41.20	18702.32	82.68
2021/7/20	18840	18862.93	−22.93	18855.92	−15.92	18928.48	−88.48	18874.53	−34.53
2021/7/21	18740	18743.18	−3.18	18735.75	4.25	18691.71	48.29	18647.38	92.62
Average error		−1.35		8.59		16.28		71.65